A listeria outbreak linked with ready-to-eat meat and poultry products from Yu Shang Food Inc. has caused 11 illnesses in four states, with nine hospitalizations and the death of an infant, according to the US Centers for Disease Control and Prevention.

An infant in California died in a listeria outbreak that has now prompted a recall of ready-to-eat meat, the Centers for Disease Control and Prevention (CDC) said.The child's pregnant mother also fell ill with listeria.

Soft cheeses, frozen breakfast foods, smoked salmon and other products have been recalled for potential listeria contaminations in the last month.